Welcome!

@CloudExpo Authors: Elizabeth White, Tom Kelly, Pat Romanski, Jason Bloomberg, Dana Gardner

Related Topics: @DevOpsSummit, Java IoT, Linux Containers, Agile Computing, @BigDataExpo

@DevOpsSummit: Blog Post

Application Failures in Production | @DevOpsSummit [DevOps]

The wealth of out-of-the-box insights you could obtain from a single urgent, albeit unspecific log message

How to Approach Application Failures in Production

In my recent article, "Software Quality Metrics for your Continuous Delivery Pipeline - Part III - Logging," I wrote about the good parts and the not-so-good parts of logging and concluded that logging usually fails to deliver what it is so often mistakenly used for: as a mechanism for analyzing application failures in production. In response to the heated debates on reddit.com/r/devops and reddit.com/r/programing, I want to demonstrate the wealth of out-of-the-box insights you could obtain from a single urgent, albeit unspecific log message if you only are equipped with the magic ingredient; full transaction context:

Examples of insights you could obtain from full transaction context on a single log message

Bear with me until I get to explain what this actually means and how it helps you get almost immediate answers to the most urgent questions when your users are struck by an application failure:

  • "How many users are affected and who are they?"
  • "Which tiers are affected by which errors and what is the root cause?"

Operator: I'm here because you broke something. (courtesy of ThinkGeek.com)

When All You Have Is a Lousy Log Message
Does this story sound familiar to you? It's a Friday afternoon and you just received the release artifacts from the development team belatedly, which need to be released by Monday morning. After spending the night and another day in operations to get this release out into production timely, you notice the Monday after that everything you have achieved in the end was some lousy log message:

08:55:26 SEVERE com.company.product.login.LoginLogic - LoginException occurred when processing Login transaction

While this scenario hopefully does not reflect a common case for you, it still shows an important aspect in the life of development and operations: working as an operator involves monitoring the production environment and providing assistance in troubleshooting application failures mainly with the help of log messages - things that developers have baked into their code. While certainly not all log messages need to be as poor as this one, getting down to the bottom of a production failure is often a tedious endeavor (see this comment on reddit by RecklessKelly who sometimes needs weeks to get his "Eureka moment") - if at all possible.

Why There Is No Such Thing as a 100% Error-Free Code
Production failures can become a major pain for your business with long-term effects: they will not only make your visitors buy elsewhere, but depending on the level of frustrations, your customers may choose to stay at your competition instead of giving you another chance.

As we all know, we just cannot get rid of application failures in production entirely. Agile methodologies, such as Extreme Programming or Scrum, aim to build quality into our processes; however, there is still no such thing as a 100% error-free application. "We need to write more tests!" you may argue and I would agree: disciplines such as TDD and ATDD should be an integral part of your software development process since they, if applied correctly, help you produce better code and fewer bugs. Still, it is simply impossible to test each and every corner of your application for all possible combinations of input parameters and application state. Essentially, we can run only a limited subset of all possible test scenarios. The common goal of developers and test automation engineers, hence, must be to implement a testing strategy, which allows them to deliver code of sufficient quality. Consequently, there is always a chance that something can go wrong, and, as a serious business, you will want to be prepared for the unpredictable and, additionally, have as much control over it as possible:

Why you cannot get rid of application failures in production: remaining failure probability

Without further ado, let's examine some precious out-of-the-box insights you could obtain if you are equipped with full transaction context and are able to capture all transactions.

Why this is important? Because it enables you to see the contributions of input parameters, processes, infrastructure and users at all times whenever a failure occurred, solve problems faster, and additionally use the presented information such as unexpected input parameters to further improve your testing strategy.

Initial Situation: Aggregated Log Messages
Instead of crawling a bunch of possibly distributed log files to determine the count of particular log messages, we may, first of all, want to have this done automatically for us just as they happen. This gives a good overview on the respective message frequencies and facilitates prioritization:

Aggregated log events: severity, logger name, message and count

What we see here (analysis view based on our PurePath technology) is that there have been 104 occurrences of the same log message in the application. We could also observe other captured event data, such as the severity level and the name of the logger instance (usually the name of the class that created the logger).

Question #1: How many users are affected and who are they?

Failed Business Transactions: "Logins" and "Logins by Username"

Having the full transactional context and not just the log message allows us to figure out which critical Business Transactions of our application are impacted. From the dashboard above we can observe that "Logins" and "Logins by Username" have failed: we see that 61 users attempted the 104 logins and who these users were by their username.

For questions 2 and 3, and for further insight, click here for the full article.

More Stories By Martin Etmajer

Martin Etmajer has 10+ years of experience as a developer and software architect, as well as in maintaining highly available and performant cluster environments. In his current role, Martin works as a Technology Strategist for Dynatrace with a focus on Continuous Delivery and DevOps. He speaks at technology conferences and meetups and publishes articles on this blog. Reach him at @metmajer

Comments (0)

Share your thoughts on this story.

Add your comment
You must be signed in to add a comment. Sign-in | Register

In accordance with our Comment Policy, we encourage comments that are on topic, relevant and to-the-point. We will remove comments that include profanity, personal attacks, racial slurs, threats of violence, or other inappropriate material that violates our Terms and Conditions, and will block users who make repeated violations. We ask all readers to expect diversity of opinion and to treat one another with dignity and respect.


@CloudExpo Stories
With an estimated 50 billion devices connected to the Internet by 2020, several industries will begin to expand their capabilities for retaining end point data at the edge to better utilize the range of data types and sheer volume of M2M data generated by the Internet of Things. In his session at @ThingsExpo, Don DeLoach, CEO and President of Infobright, will discuss the infrastructures businesses will need to implement to handle this explosion of data by providing specific use cases for filte...
SYS-CON Events announced today that Pythian, a global IT services company specializing in helping companies adopt disruptive technologies to optimize revenue-generating systems, has been named “Bronze Sponsor” of SYS-CON's 18th Cloud Expo, which will take place on June 7-9, 2015 at the Javits Center in New York, New York. Founded in 1997, Pythian is a global IT services company that helps companies compete by adopting disruptive technologies such as cloud, Big Data, advanced analytics, and DevO...
SYS-CON Events announced today that VAI, a leading ERP software provider, will exhibit at SYS-CON's 18th International Cloud Expo®, which will take place on June 7-9, 2016, at the Javits Center in New York City, NY. VAI (Vormittag Associates, Inc.) is a leading independent mid-market ERP software developer renowned for its flexible solutions and ability to automate critical business functions for the distribution, manufacturing, specialty retail and service sectors. An IBM Premier Business Part...
SYS-CON Events announced today that Catchpoint Systems, Inc., a provider of innovative web and infrastructure monitoring solutions, has been named “Silver Sponsor” of SYS-CON's DevOps Summit at 18th Cloud Expo New York, which will take place June 7-9, 2016, at the Javits Center in New York City, NY. Catchpoint is a leading Digital Performance Analytics company that provides unparalleled insight into customer-critical services to help consistently deliver an amazing customer experience. Designed...
SYS-CON Events announced today that Alert Logic, Inc., the leading provider of Security-as-a-Service solutions for the cloud, will exhibit at SYS-CON's 18th International Cloud Expo®, which will take place on June 7-9, 2016, at the Javits Center in New York City, NY. Alert Logic, Inc., provides Security-as-a-Service for on-premises, cloud, and hybrid infrastructures, delivering deep security insight and continuous protection for customers at a lower cost than traditional security solutions. Ful...
In most cases, it is convenient to have some human interaction with a web (micro-)service, no matter how small it is. A traditional approach would be to create an HTTP interface, where user requests will be dispatched and HTML/CSS pages must be served. This approach is indeed very traditional for a web site, but not really convenient for a web service, which is not intended to be good looking, 24x7 up and running and UX-optimized. Instead, talking to a web service in a chat-bot mode would be muc...
More and more companies are looking to microservices as an architectural pattern for breaking apart applications into more manageable pieces so that agile teams can deliver new features quicker and more effectively. What this pattern has done more than anything to date is spark organizational transformations, setting the foundation for future application development. In practice, however, there are a number of considerations to make that go beyond simply “build, ship, and run,” which changes ho...
SYS-CON Events announced today that Interoute, owner-operator of one of Europe's largest networks and a global cloud services platform, has been named “Bronze Sponsor” of SYS-CON's 18th Cloud Expo, which will take place on June 7-9, 2015 at the Javits Center in New York, New York. Interoute is the owner-operator of one of Europe's largest networks and a global cloud services platform which encompasses 12 data centers, 14 virtual data centers and 31 colocation centers, with connections to 195 ad...
Advances in technology and ubiquitous connectivity have made the utilization of a dispersed workforce more common. Whether that remote team is located across the street or country, management styles/ approaches will have to be adjusted to accommodate this new dynamic. In his session at 17th Cloud Expo, Sagi Brody, Chief Technology Officer at Webair Internet Development Inc., focused on the challenges of managing remote teams, providing real-world examples that demonstrate what works and what do...
As enterprises work to take advantage of Big Data technologies, they frequently become distracted by product-level decisions. In most new Big Data builds this approach is completely counter-productive: it presupposes tools that may not be a fit for development teams, forces IT to take on the burden of evaluating and maintaining unfamiliar technology, and represents a major up-front expense. In his session at @BigDataExpo at @ThingsExpo, Andrew Warfield, CTO and Co-Founder of Coho Data, will dis...
SYS-CON Events announced today that Men & Mice, the leading global provider of DNS, DHCP and IP address management overlay solutions, will exhibit at SYS-CON's 18th International Cloud Expo®, which will take place on June 7-9, 2016, at the Javits Center in New York City, NY. The Men & Mice Suite overlay solution is already known for its powerful application in heterogeneous operating environments, enabling enterprises to scale without fuss. Building on a solid range of diverse platform support,...
SYS-CON Events announced today that Commvault, a global leader in enterprise data protection and information management, has been named “Bronze Sponsor” of SYS-CON's 18th International Cloud Expo, which will take place on June 7–9, 2016, at the Javits Center in New York City, NY, and the 19th International Cloud Expo, which will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. Commvault is a leading provider of data protection and information management...
SYS-CON Events announced today that AppNeta, the leader in performance insight for business-critical web applications, will exhibit and present at SYS-CON's @DevOpsSummit at Cloud Expo New York, which will take place on June 7-9, 2016, at the Javits Center in New York City, NY. AppNeta is the only application performance monitoring (APM) company to provide solutions for all applications – applications you develop internally, business-critical SaaS applications you use and the networks that deli...
It's easy to assume that your app will run on a fast and reliable network. The reality for your app's users, though, is often a slow, unreliable network with spotty coverage. What happens when the network doesn't work, or when the device is in airplane mode? You get unhappy, frustrated users. An offline-first app is an app that works, without error, when there is no network connection.
The cloud promises new levels of agility and cost-savings for Big Data, data warehousing and analytics. But it’s challenging to understand all the options – from IaaS and PaaS to newer services like HaaS (Hadoop as a Service) and BDaaS (Big Data as a Service). In her session at @BigDataExpo at @ThingsExpo, Hannah Smalltree, a director at Cazena, will provide an educational overview of emerging “as-a-service” options for Big Data in the cloud. This is critical background for IT and data profes...
Father business cycles and digital consumers are forcing enterprises to respond faster to customer needs and competitive demands. Successful integration of DevOps and Agile development will be key for business success in today’s digital economy. In his session at DevOps Summit, Pradeep Prabhu, Co-Founder & CEO of Cloudmunch, covered the critical practices that enterprises should consider to seamlessly integrate Agile and DevOps processes, barriers to implementing this in the enterprise, and pr...
Cognitive Computing is becoming the foundation for a new generation of solutions that have the potential to transform business. Unlike traditional approaches to building solutions, a cognitive computing approach allows the data to help determine the way applications are designed. This contrasts with conventional software development that begins with defining logic based on the current way a business operates. In her session at 18th Cloud Expo, Judith S. Hurwitz, President and CEO of Hurwitz & ...
As someone who has been dedicated to automation and Application Release Automation (ARA) technology for almost six years now, one of the most common questions I get asked regards Platform-as-a-Service (PaaS). Specifically, people want to know whether release automation is still needed when a PaaS is in place, and why. Isn't that what a PaaS provides? A solution to the deployment and runtime challenges of an application? Why would anyone using a PaaS then need an automation engine with workflow ...
SYS-CON Events announced today that Fusion, a leading provider of cloud services, will exhibit at SYS-CON's 18th International Cloud Expo®, which will take place on June 7-9, 2016, at the Javits Center in New York City, NY. Fusion, a leading provider of integrated cloud solutions to small, medium and large businesses, is the industry's single source for the cloud. Fusion's advanced, proprietary cloud service platform enables the integration of leading edge solutions in the cloud, including clou...
Your business relies on your applications and your employees to stay in business. Whether you develop apps or manage business critical apps that help fuel your business, what happens when users experience sluggish performance? You and all technical teams across the organization – application, network, operations, among others, as well as, those outside the organization, like ISPs and third-party providers – are called in to solve the problem.